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Re: Call for volunteers: add tree-sitter support to major modes

From: Theodor Thornhill
Subject: Re: Call for volunteers: add tree-sitter support to major modes
Date: Sun, 09 Oct 2022 11:47:31 +0200

On 9 October 2022 11:03:48 CEST, Eli Zaretskii <eliz@gnu.org> wrote:
>The Emacs 29 release branch is planned to be cut in about 1.5 months,
>and we want tree-sitter support to be in Emacs 29.  The Emacs Git
>repository has a feature branch that integrates tree-sitter with
>Emacs.  That branch is being prepared for landing on master.  However,
>currently there's only one major-mode which can use tree-sitter
>support on the branch: Python mode.  We need to add tree-sitter
>integration to more major modes, so that Emacs 29 could have
>reasonably useful tree-sitter support options in at least the popular
>major modes.
>This is a call for volunteers to work on adding tree-sitter support to
>major modes beyond Python, and on improving the existing support in
>Python mode.
>Some of the popular major modes for which we would like to see
>tree-sitter support in Emacs 29 are:
> c-mode
> c++-mode
> emacs-lisp-mode
> js-mode
> js-json-mode
> ruby-mode
> shell-script-mode

I can do js-mode. I already have made a patch before the api stabilised, and am 
pretty familiar with the whole thing. I'll look at python and go from that. 

>We probably won't have all of them by Emacs 29, but we hope to have at
>least some.
>So if you are interested in enhancing your favorite major-mode with
>tree-sitter support, and by doing that making Emacs 29 much better,
>please checkout the feature/tree-sitter branch, and start working on
>some mode(s).  Tree-sitter support for a major-mode should include
>enhancement of one or more of the following Emacs features:
> - font-lock
> - indentation
> - navigation (beginning-of-defun-function etc.)
> - imenu
> - which-func
> - thing-at-point
>We think that font-lock is the absolute minimum, followed by
>To help with this effort, Yuan Fu, who did most of the development on
>this feature branch, wrote a document with guidance notes which aim to
>help you implement tree-sitter support for the above features.  You
>will find that document and some other helpful documentation in the
>admin/notes/tree-sitter directory and its subdirectories on the
>branch.  That directory also includes scripts for easy compilation of
>tree-sitter language modules (which you will need to download from the
>tree-sitter site).
>We hope that the existing support for Python can serve as working
>example of how to add tree-sitter support for other major modes, and
>together with the guidance document it will allow you to add support
>for more modes with minimum effort.  Don't hesitate to ask questions
>if something is unclear or you need more advice.
>We hope volunteers will step forward in time to make tree-sitter
>integration in Emacs 29 functional and useful.  To avoid waste of
>effort, please announce here on which major mode(s) you decided to
>Thanks in advance.

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